SheetMetal AddJunction: Difference between revisions

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==Description==
==Description==


The [[Image:SheetMetal_Junction.svg|24px]] SheetMetal Junction tool...
The [[Image:SheetMetal Junction.svg|24px]] SheetMetal Junction tool.


:[[Image:Involute-Gear example.png]]
:[[File:PostGap.png|320px]]
:{{Caption|From left to right: caption in here
:{{Caption|Junction applied to corner.
}}
}}


==Usage==
==Usage==
To add junction to corner of corner:
To Extend the face:
# Start with a base plate or sheet, select a thin face representing the thickness of the metal sheet
# Start with a base plate or sheet, select a corner vertex to apply relief
# Click on the [[Image:SheetMetal_Extrude.svg|24px]] '''Extrude''' tool to extend the face.
# Click on the [[Image:SheetMetal Junction.svg|24px]] '''Junction''' tool to add a junction cut to corner.


<!--T:12-->
<!--T:12-->
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::* [[File:Draft_Wire.svg|24px]] [[Draft Wire]] or a
::* [[File:Draft_Wire.svg|24px]] [[Draft Wire]] or a
::* [[File:Sketcher_NewSketch.svg|24px]] [[Sketcher NewSketch|Sketch]]
::* [[File:Sketcher_NewSketch.svg|24px]] [[Sketcher NewSketch|Sketch]]
::* Use [[Image:Part_Thickness.svg|24px]] [[Part Thickness]] to create shell ({{Emphasis|Typically with the thickness value of the sheet metal.}})
:* Method 3: [[File:PartDesign_Body.svg|24px]] [[PartDesign Body]] containing either an
:* Method 3: [[File:PartDesign_Body.svg|24px]] [[PartDesign Body]] containing either an
::* [[File:PartDesign_AdditiveBox.svg|24px]] [[PartDesign AdditiveBox|additive box]] or a
::* [[File:PartDesign_AdditiveBox.svg|24px]] [[PartDesign AdditiveBox|additive box]] or a
::* [[File:PartDesign_Pad.svg|24px]] [[PartDesign Pad]] made from a [[File:Sketcher_NewSketch.svg|24px]] [[Sketcher NewSketch|Sketch]].
::* [[File:PartDesign_Pad.svg|24px]] [[PartDesign Pad]] made from a [[File:Sketcher_NewSketch.svg|24px]] [[Sketcher NewSketch|Sketch]].
::* Use [[File:PartDesign Thickness.svg|24px]] [[PartDesign Thickness]] to create shell ({{Emphasis|Typically with the thickness value of the sheet metal.}})
::If you start with a [[File:PartDesign_Body.svg|24px]] PartDesign Body, you can mix Sheet Metal features with PartDesign features such as [[File:PartDesign_Pocket.svg|24px]] [[PartDesign Pocket|pockets]] or [[File:PartDesign_Hole.svg|24px]] [[PartDesign Hole|holes]].
::If you start with a [[File:PartDesign_Body.svg|24px]] PartDesign Body, you can mix Sheet Metal features with PartDesign features such as [[File:PartDesign_Pocket.svg|24px]] [[PartDesign Pocket|pockets]] or [[File:PartDesign_Hole.svg|24px]] [[PartDesign Hole|holes]].

<!--T:50-->
{{Emphasis|Note}}: In an extension operation, set {{incode|Refine {{:=}} true}}.


==Properties==
==Properties==
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{{Properties_Title|Base}}
{{Properties_Title|Base}}


* {{PropertyData|angle}}: Bend angle.
* {{PropertyData|Label}}: User name of the object in the [[Tree_view|Tree view]].
* {{PropertyData|extend1}}: Extends the wall on the left side.
* {{PropertyData|extend2}}: Extends the wall on the right side.
* {{PropertyData|gap1}}: Gap from the left side.
* {{PropertyData|gap2}}: Gap from the right side.
* {{PropertyData|invert}}: Invert bend direction.
* {{PropertyData|length}}: Length of the wall.
* {{PropertyData|miterangle1}}: Bend miter angle on the left side.
* {{PropertyData|miterangle2}}: Bend miter angle on the right side.
* {{PropertyData|radius}}: Bend radius.
* {{PropertyData|relief Type}}: Rectangle or Round. Enabled only when a gap value is set.
* {{PropertyData|reliefd}}: Relief depth. Enabled only when a gap value is set.
* {{PropertyData|reliefw}}: Relief width. Enabled only when a gap value is set.
* {{PropertyData|kfactor}}: K factor (also known as neutral factor) for the bend. Used to calculate bend allowance when unfolding.
* {{PropertyData|unfold}}: False (default) or True. If true, unfolds the bend.


{{Properties_Title|computed}}
{{Properties_Title|Parameters}}


* {{PropertyData|dw}}: Pitch diameter (not changeable, is calculated automatically).
* {{PropertyData|gap}}: Size of gap/junction to be added.


{{Properties_Title|gear_parameter}}

* {{PropertyData|beta}}: With the helix angle β a helical gear is created (positive value → rotation direction right, negative value → rotation direction left).
* {{PropertyData|clearance}}: Default is 0,25 (see also the information in {{Emphasis|Notes}}).
* {{PropertyData|double_gear}}: {{Emphasis|True}} creates a double helix gear (see also the information in {{Emphasis|Notes}})
* {{PropertyData|head}}: Default is 0,00. This value is used to change the tooth height.
* {{PropertyData|height}}: Value of the gear width.
* {{PropertyData|module}}: Module is the ratio of the reference diameter of the gear divided by the number of teeth (see also the information in {{Emphasis|Notes}}).
* {{PropertyData|numpoints}}: Default is 6, change of the involute profile. Changing the value can lead to unexpected results.
* {{PropertyData|properties_from_tool}}: If helix angle β is given and {{Emphasis|properties_from-tool}} is enabled, gear parameters are internally recomputed for the rotated gear.
* {{PropertyData|shift}}: Default is 0,00, generates a positive and negative profile shift (see also the information in {{Emphasis|Notes}}).
* {{PropertyData|simple}}: {{Emphasis|True}} generates a simplified display (without teeth and only a cylinder in pitch diameter).
* {{PropertyData|teeth}}: Number of teeth (see also the information in {{Emphasis|Notes}})
* {{PropertyData|undercut}}: {{Emphasis|True}} changes the profil of the tooth root (see also the information in {{Emphasis|Notes}}).

{{Properties_Title|involute_parameter}}

* {{PropertyData|pressure_parameter}}: Default is 20 (see also the information in {{Emphasis|Notes}}).

{{Properties_Title|tolerance}}

* {{PropertyData|backslash}}: Default is 0,00. Backlash, also called lash or play, is the distance between the teeths at a gear pair.
* {{PropertyData|reversed_backslash}}: {{Emphasis|True}} backlash decrease or {{Emphasis|False}} backlash increase (see also the information in {{Emphasis|Notes}}).


=== View ===
=== View ===
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==Notes==
==Notes==

* {{Emphasis|clearance}}: At a gear pair, clearance is the distance between the tooth tip of the first gear and the tooth root of the second gear.
* {{Emphasis|double_gear}}: To use the double helical gearing the helix angle β ({{Emphasis|beta}}) for the helical gearing must first be entered.
* {{Emphasis|module}}: Using ISO (International Organization for Standardization) guidelines, Module size is designated as the unit representing gear tooth-sizes. Module (m): m = 1 (p = 3.1416), m = 2 (p = 6.2832), m = 4 (p = 12.566). If you multiply Module by Pi, you can obtain Pitch (p). Pitch is the distance between corresponding points on adjacent teeth.
* {{Emphasis|shift}}: Profile shift is not merely used to prevent undercut. It can be used to adjust center distance between two gears. If a positive correction is applied, such as to prevent undercut in a pinion, the tooth thickness at top is thinner.
* {{Emphasis|teeth}}: If the number of teeth is changed, the pitch diameter also changes ({{Emphasis|dw}}).
* {{Emphasis|undercut}}: Undercut is used when the number of teeth of a gear is too small. Otherwise the mating gear will cut into the tooth root. The undercut not only weakens the tooth with a wasp-like waist, but also removes some of the useful involute adjacent to the base circle.
* {{Emphasis|pressure_parameter}}: 20° is a standard value here. The pressure angle is defined as the angle between the line-of-action (common tangent to the base circles) and a perpendicular to the line-of-centers. Thus, for standard gears, 14.5° pressure angle gears have base circles much nearer to the roots of teeth than 20° gears. It is for this reason that 14.5° gears encounter greater undercutting problems than 20° gears. Important. the pressure angle changes with a profile shift. Only change the parameter, if sufficient knowledge of the gear geometry is available.
* {{Emphasis|reversed_backslash}}: If there are several gears, pay attention to which gear the parameter is set for.


==Limitations==
==Limitations==
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Limitation are not known yet.
Limitation are not known yet.


==Scripting==
==Scripting==


Use the power of python to automate your gear modeling:
</translate>
{{Code|code=
import FreeCAD as App
import freecad.gears.commands
gear = freecad.gears.commands.CreateInvoluteGear.create()
gear.teeth = 20
gear.beta = 20
gear.height = 10
gear.double_helix = True
App.ActiveDocument.recompute()
Gui.SendMsgToActiveView("ViewFit")
}}
<translate>
{{Docnav
|
|
|[[SheetMetal_Workbench|SheetMetal Workbench]]
|IconL=
|IconC=Sheetmetal_workbench_icon.svg
|IconR=
}}
</translate>
</translate>
[[Category:Addons{{#translation:}}]]
[[Category:Addons{{#translation:}}]]

Revision as of 15:33, 2 June 2020

This documentation is not finished. Please help and contribute documentation.

GuiCommand model explains how commands should be documented. Browse Category:UnfinishedDocu to see more incomplete pages like this one. See Category:Command Reference for all commands.

See WikiPages to learn about editing the wiki pages, and go to Help FreeCAD to learn about other ways in which you can contribute.

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SheetMetal Junction

Menu location
SheetMetal → Junction
Workbenches
SheetMetal
Default shortcut
None
Introduced in version
-
See also
None

Description

The SheetMetal Junction tool.

Junction applied to corner.

Usage

To add junction to corner of corner:

  1. Start with a base plate or sheet, select a corner vertex to apply relief
  2. Click on the Junction tool to add a junction cut to corner.

Note: The workbench does not have a tool to create a base plate, so you need to start your model with one of the following methods:

If you start with a PartDesign Body, you can mix Sheet Metal features with PartDesign features such as pockets or holes.

Properties

Data

Base

  • DataLabel: User name of the object in the Tree view.

Parameters

  • Datagap: Size of gap/junction to be added.


View

The parameter descriptions of the View tab will be found in Property editor, further below at Example of the properties of a PartDesign object.

Notes

Limitations

Limitation are not known yet.

Scripting